Prionus imbricornis (?) (Tile-horned Prionus).
 
 
 
Size: approx. 40 mm. Photo: 06/16/12, 11 pm.


 This very big and impressive beetle is probably Prionus imbricornis.  
 
 
bug guide (this photo):
http://bugguide.net/node/view/658311